-old, sitting on the porch with her mother. we take you inside a hidden america. to chicago, where we meet children, afraid to leave their houses. and the young gang members caught up in a brutal battle. >> you got to be smart out here because you will be gone. off this earth. i i might not even make it today. >> and, an unprecedented event, as we bring 38 gang members together to sit down and talk with their rivals. and with the courageous mothers and children begging them to stop. >> don't shoot -- >> don't shoot -- >> don't shoot, i want to grow up. >> announcer: from the global resources of abc news, with terry moran, bill weir, and tonight, cynthia mcfadden with diane sawyer in new york city, this is a special edition of "nightline," october 19th, 2012. >> good evening, i'm cynthia mcfadden. tonight, my colleague and "world news" anchor, diane sawyer, joins us with the latest in on ongoing abc news series, hidden america. this one, from the streets of chicago. diane, the powerful report we're about to see really takes us inside what can only be described as a hidden american war zone.